Peace Hill FX is a boutique pedal builder based in Minoh City, Osaka, Japan, founded by Koji Tagaki. The company specializes in tube-driven preamp pedals inspired by revered high-end amplifiers, with each unit handmade one at a time using vintage-style components. Its tagline, "Pure Analog Tones," reflects a focus on authentic analog circuitry rather than digital modeling.

The lineup centers on tube preamps voiced after iconic amp circuits, including the SSS (inspired by the Dumble Steel String Singer), the ODS (Overdrive Special), and the TRJM (voiced after the Two-Rock John Mayer signature), alongside the TR and DR preamps. The builder also offers a modified TS808 "Tube Scream" with a 12AU7 tube. Many of the pedals are housed in enclosures wrapped in tolex, suede, or kimono fabric finishes.

Peace Hill FX originated from Tagaki's own band activities and his search for specific tones in his rig, which led him to build the pedals he wanted to play himself. The brand is distributed internationally through boutique dealers such as Electric Mojo Guitars, jMave Guitars, and Southern Guitars, in addition to direct sales.

Peace Hill FX has 2 products cataloged on Equipboard, including Guitar Preamp Pedals.